diff --git a/index.html b/index.html
index f16242a..6581073 100644
--- a/index.html
+++ b/index.html
@@ -42,6 +42,7 @@
     float: none;
     padding: 0px;
     margin-left: var(--navWidth);
+    height: 1000px;
     height : 100vh;
     /* background: #1363A7; */
     background: #6DB33E;
@@ -49,7 +50,7 @@
   a {
     color : #F7CF3C;
   }
-  
+ 
  .column1{
   float : left;
   width : 50%;
@@ -123,10 +124,10 @@
          <td style="text-align:right"><a href="instruction.html" target="uploaded">Intructions & Credits</a></td>
        </tr>
        <tr>
-        <td style="text-align:right"><a href="WoodsSaxon.html" target="uploaded">Woods-Saxon (const.)</a></td>
+        <td style="text-align:right"><a href="test.html" target="_blank">Woods-Saxon (const.)</a></td>
        </tr>
        <tr>
-        <td style="text-align:right"><a href="nuclearChart.html" target="uploaded">Nuclides Chart (const.)</a></td>
+        <td style="text-align:right"><a href="nuclearChart.html" target="_blank">Nuclides Chart (const.)</a></td>
        </tr>
 
     <table>    
@@ -156,7 +157,7 @@
   </nav>
 
   <!-- ////////////////////////////////////////// -->
-  <article id="article">
+  <article id="article" >
       <iframe id="main" name="uploaded" style="border:none;width:100%;"  src="heliosmatics.html"></iframe>
   </article>
 </section>
diff --git a/test.cpp b/test.cpp
index 1c89d36..17249ef 100644
--- a/test.cpp
+++ b/test.cpp
@@ -20,9 +20,6 @@
 #include <iostream>
 #include <vector>
 
-
-//======= Woods-Saxon Library
-#include "RK4.h"
 #include "WS.h"
 
 const int nPt = 300;
@@ -45,7 +42,6 @@ GLFWwindow* g_window;
 ImVec4 clear_color = ImVec4(0.427, 0.702f, 0.243f, 1.00f);
 int g_width;
 int g_height;
-
 // Function used by c++ to get the size of the html canvas
 EM_JS(int, canvas_get_width, (), {
   return Module.canvas.width;
@@ -99,6 +95,7 @@ void loop(){
   //  Woods-Saxon window
   {
     ImGui::SetNextWindowSize(ImVec2(600, 1000), ImGuiCond_FirstUseEver);
+    ImGui::SetNextWindowPos(ImVec2(50, 50), ImGuiCond_FirstUseEver);
     static float V0 = -45, r0 = 1.25, R0 = 3.5, a0 = 0.6;
     static float VSO = 28, rSO = 1.25, RSO = 3.5, aSO = 0.6;
     static int Z = 0, nStep = 300;
@@ -109,8 +106,27 @@ void loop(){
     ImGui::Begin("Woods-Saxon Calculation");
 
     static int e = 0;
-    ImGui::RadioButton("Arbitary", &e, 0); ImGui::SameLine();
-    ImGui::RadioButton("Isotope", &e, 1);
+    if( ImGui::RadioButton("Arbitary", &e, 0) ){
+      A = 1; 
+    }
+    ImGui::SameLine();
+    if( ImGui::RadioButton("Isotope", &e, 1) ){
+      rc = 1.25;
+      r0 = 1.25;
+      rSO = 1.25;
+    }
+
+    if( e == 0){
+      rc = Rc / pow(A, 1./3); 
+      r0 = R0 / pow(A, 1./3);
+      rSO = RSO / pow(A, 1./3);
+    }
+
+    if( e == 1){
+      Rc = rc * pow(A, 1./3);
+      R0 = r0 * pow(A, 1./3);
+      RSO = rSO * pow(A, 1./3);
+    }
     ImGui::Separator();
 
     ImGui::PushItemWidth(100);
@@ -128,14 +144,6 @@ void loop(){
     ImGui::DragFloat("rc [fm] ", &rc, 0.01, 1, 10); 
     ImGui::EndDisabled();
 
-    if( e == 0 ) {A = 1; rc = Rc / pow(A, 1./3);}
-    if( e == 1 ) {
-      rc = 1.25;
-      r0 = 1.25;
-      rSO = 1.25;
-      Rc = rc * pow(A, 1./3);
-    }
-
     ImGui::Text("Eff. mass : %.3f ", mass);
 
     ImGui::Separator();
@@ -145,16 +153,12 @@ void loop(){
     ImGui::BeginDisabled(e==1); ImGui::DragFloat("R0 [fm] ", &R0, 0.01, 1, 10); ImGui::EndDisabled();
     ImGui::SameLine();
     ImGui::BeginDisabled(e==0); ImGui::DragFloat("r0 [fm] ", &r0, 0.01, 1, 10); ImGui::EndDisabled();
-    if( e == 0 ) {A = 1; r0 = R0 / pow(A, 1./3);}
-    if( e == 1 ) R0 = r0 * pow(A, 1./3);
 
     ImGui::DragFloat("a0 [fm]", &a0, 0.01, 0.1, 2); 
     ImGui::DragFloat("VSO [MeV]", &VSO, 0.1, 0, 40);
     ImGui::BeginDisabled(e==1); ImGui::DragFloat("RSO [fm] ", &RSO, 0.01, 1, 10); ImGui::EndDisabled();
     ImGui::SameLine();
     ImGui::BeginDisabled(e==0); ImGui::DragFloat("rSO [fm] ", &rSO, 0.01, 1, 10); ImGui::EndDisabled();
-    if( e == 0 ) {A = 1; rSO = RSO / pow(A, 1./3);}
-    if( e == 1 ) RSO = rSO * pow(A, 1./3);
     ImGui::DragFloat("aSO [fm]", &aSO, 0.01, 0.1, 2);
 
     ImGui::Separator();
@@ -258,7 +262,7 @@ void loop(){
   //*============= WS Trend
   {
     ImGui::SetNextWindowSize(ImVec2(600, 800), ImGuiCond_FirstUseEver);
-    ImGui::SetNextWindowPos(ImVec2(100, 200), ImGuiCond_FirstUseEver);
+    ImGui::SetNextWindowPos(ImVec2(680, 50), ImGuiCond_FirstUseEver);
     static float V0 = -45, r0 = 1.25, a0 = 0.6;
     static float VSO = 28, rSO = 1.25,  aSO = 0.6;
     static int Z = 0, N = 1, nStep = 300;
@@ -479,8 +483,20 @@ void loop(){
 
         ImPlot::EndPlot();
       }
+
+      static bool saveDataClicked = false;
+      if( ImGui::Button("Download data") ){
+        // FILE * file_out;
+        // file_out = fopen("", "w+");
+        saveDataClicked = true;
+      }
+
+      if( saveDataClicked ) {
+        ImGui::Text("to be impletmented....");
+      } 
     }
 
+
     ImGui::End();
   }
 
@@ -509,7 +525,7 @@ int init_gl(){
   // Open a window and create its OpenGL context
   int canvasWidth = g_width;
   int canvasHeight = g_height;
-  g_window = glfwCreateWindow(canvasWidth, canvasHeight, "WebGui Demo", NULL, NULL);
+  g_window = glfwCreateWindow(canvasWidth, canvasHeight, "Woods-Saxon Calculation Demo", NULL, NULL);
   if( g_window == NULL ){
       fprintf( stderr, "Failed to open GLFW window.\n" );
       glfwTerminate();